fix: add geometry extension type

extensions/extension_types.yaml

@@ -4,21 +4,10 @@ types:
     structure:
       latitude: i32
       longitude: i32
-  - name: multipoint
-    structure:
-      x: point
-      y: point
   - name: line
     structure:
       start: point
       end: point
-  - name: linestring
-    structure:
-      coordinate: point
-    variadic:
-      min: 2
-  - name: polygon
+  - name: geometry
     structure:
-      coordinates: linestring
-    variadic:
-      min: 1
+      coordinates: List<point>

extensions/functions_geometry.yaml

@@ -15,28 +15,15 @@ scalar_functions:
   -
     name: "st_makeline"
     description: >
-      Return a linestring containing the points of point, multipoint, or linestring geometries.
-      Repeated points at the beginning of input linestring are collapsed to a single point.
-      Repeated points in point and multipoint inputs are not collapsed.
+      Return a linestring containing the points of the two input geometries.
+      Repeated points at the beginning of input geometries are collapsed to a single point.
 
       A linestring can be closed or simple.  A closed linestring starts and ends on the same
-      point.  A simple linestring does not cross or touch itself.
+      point. A simple linestring does not cross or touch itself.
     impls:
       - args:
           - name: x
-            value: point
+            value: geometry
           - name: y
-            value: point
-        return: linestring
-      - args:
-          - name: x
-            value: multipoint
-          - name: y
-            value: multipoint
-        return: linestring
-      - args:
-          - name: x
-            value: linestring
-          - name: y
-            value: linestring
-        return: linestring
+            value: geometry
+        return: geometry